Close up picture of Ocean Quahog (Arctica islandica) shells on a sandy beach

These shells are called Ocean Quahog (Arctica islandica) and I had to take a photo of them because I liked the way the pair was placed on the sandy beach.
In Norwegian we call them Cow-Shells, probably because of their beautiful red/brown color.
According to the Norwegian Wikipedia (the English version doesn’t have an article about ocean quahog shells) there have been found individuals of these shells that are as old as 220 years!